the type of "root" often dug up by backhoes. in truth, these are often neglected, low-grade communication cables, as opposed to the awesome, expensive fibre optics laid down today. backhoe operators will often have a "see no evil" attitude when digging these up
"ay man, john just dug up a bunch of rainbow root and i saw him do it."
"okay, if mike (the boss) sees it just tell him it was from a rainbow tree so we don't get in trouble."
"i gotchu man"